c++ - xstring在0x1005E5F6(ucrtbased.dll)抛出未处理的异常

我正在编写一个教程，以在Windows 8.1的更新版本上使用Visual Studio Community 2017的最新版本学习C++。
当我调整以下.cpp文件并运行该程序时，输入错误后输入崩溃:

#include "stdafx.h"
#include "FBullCowGame.h"

using int32 = int;

FBullCowGame::FBullCowGame() { Reset(); }

int32 FBullCowGame::GetMaxTries() const { return MyMaxTries; }
int32 FBullCowGame::GetCurrentTry() const { return MyCurrentTry; }

void FBullCowGame::Reset()
{
    constexpr int32 MAX_TRIES = 8;
    MyMaxTries = MAX_TRIES;

    const FString HIDDEN_WORD = "ant";
    MyHiddenWord = HIDDEN_WORD;

    MyCurrentTry = 1;
    return;
}


bool FBullCowGame::IsGameWon () const { return false; }

bool FBullCowGame::CheckGuessValidity(FString)
{
    return false;
}
// Receives a VALID guess, increments turn, and returns count

FBullCowCount FBullCowGame::SubmitGuess(FString Guess)
{
    // incriment the turn number
    MyCurrentTry++;

    // setup a return variable
    FBullCowCount BullCowCount;

    // loop through all letters in the guess
    int32 HiddenWordLength = MyHiddenWord.length();
    for (int32 i = 0; i < Guess.length(); i++) {
        // compare letters against the hidden word
        for (int32 j = 0; j < HiddenWordLength; j++) {
            // if they match then
            if (Guess[j] == MyHiddenWord[i]) {
                if (i == j) { // if they're in the same place
                    BullCowCount.Bulls++; // incriment bulls
                }
                else {
                    BullCowCount.Cows++; // must be a cow
                }
            }
        }
    }
    return BullCowCount;
}

调试时，我进入xstring中提到的行，它给出以下错误:

对于代码:

    reference operator[](const size_type _Off)
    {   // subscript mutable sequence
    auto& _My_data = this->_Get_data();
    _IDL_VERIFY(_Off <= _My_data._Mysize, "string subscript out of range");
    return (_My_data._Myptr()[_Off]);
    }

我执行的操作似乎触发了一个断点，但是代码反映了本教程中的代码，并且本教程的代码可以正确编译并运行。
有人知道如何处理吗？我的搜索空无一物。

最佳答案

这看起来非常可疑:

for (int32 i = 0; i < Guess.length(); i++) {
    // compare letters against the hidden word
    for (int32 j = 0; j < HiddenWordLength; j++) {
        ...

注意，i受猜测的长度限制，j受HiddenWord的长度限制。

请注意，您在这里混合了索引变量:

        // if they match then
        if (Guess[j] == MyHiddenWord[i]) {

另外，由于异常在operator []中，因此您应该一直在看这行，这是您发布的代码中唯一使用有问题的运算符的地方... :)

关于c++ - xstring在0x1005E5F6(ucrtbased.dll)抛出未处理的异常，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/46081928/